(a.) Worthy of being remarked or noticed; noticeable; conspicuous; hence, uncommon; extraordinary.

appalling arresting astonishing astounding beguiling bewildering celebrated conspicuous curious different distinguished egregious eminent enigmatic esteemed estimable exceptional extraordinary fabulous fantastic fascinating formidable important impressive incomprehensible inconceivable incredible indescribable ineffable legendary marked marvelous memorable miraculous momentous mythical noble notable noteworthy noticeable odd of mark outlandish outstanding passing strange peculiar phenomenal portentous prestigious prodigious prominent puzzling rare rememberable reputable salient sensational signal significant singular special strange striking stupefying stupendous superior surprising telling unbelievable uncommon uncustomary unexampled unforgettable unheard-of unimaginable unique unordinary unparalleled unprecedented unspeakable unusual unwonted weighty wonderful wondrous